﻿using System;
using System.IO;
using System.Security.Cryptography;
using System.Text;
using System.Web.Security;

namespace wojilu
{
    /// <summary> 
    /// 加密
    /// </summary> 
    public class AES
    {
        //默认密钥向量
        private static byte[] Keys = { 0x41, 0x72, 0x65, 0x79, 0x6F, 0x75, 0x6D, 0x79, 0x53, 0x6E, 0x6F, 0x77, 0x6D, 0x61, 0x6E, 0x3F };

        public static string Encode(string encryptString, string encryptKey)
        {
            encryptKey = StringHelper.GetSubString(encryptKey, 32, "");
            encryptKey = encryptKey.PadRight(32, ' ');

            RijndaelManaged rijndaelProvider = new RijndaelManaged();
            rijndaelProvider.Key = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 32));
            rijndaelProvider.IV = Keys;
            ICryptoTransform rijndaelEncrypt = rijndaelProvider.CreateEncryptor();

            byte[] inputData = Encoding.UTF8.GetBytes(encryptString);
            byte[] encryptedData = rijndaelEncrypt.TransformFinalBlock(inputData, 0, inputData.Length);

            return Convert.ToBase64String(encryptedData);
        }

        public static string Decode(string decryptString, string decryptKey)
        {
            try
            {
                decryptKey = StringHelper.GetSubString(decryptKey, 32, "");
                decryptKey = decryptKey.PadRight(32, ' ');

                RijndaelManaged rijndaelProvider = new RijndaelManaged();
                rijndaelProvider.Key = Encoding.UTF8.GetBytes(decryptKey);
                rijndaelProvider.IV = Keys;
                ICryptoTransform rijndaelDecrypt = rijndaelProvider.CreateDecryptor();

                byte[] inputData = Convert.FromBase64String(decryptString);
                byte[] decryptedData = rijndaelDecrypt.TransformFinalBlock(inputData, 0, inputData.Length);

                return Encoding.UTF8.GetString(decryptedData);
            }
            catch
            {
                return "";
            }

        }

    }

    /// <summary> 
    /// 加密
    /// </summary> 
    public class DES
    {
        //默认密钥向量
        private static string DefaultKey = "19841023";
        private static byte[] Keys = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };

        /// <summary>
        /// DES加密字符串
        /// </summary>
        /// <param name="encryptString">待加密的字符串</param>
        /// <param name="encryptKey">加密密钥,要求为8位</param>
        /// <returns>加密成功返回加密后的字符串,失败返回源串</returns>
        public static string Encode(string encryptString, string encryptKey)
        {
            encryptKey = StringHelper.GetSubString(encryptKey, 8, "");
            encryptKey = encryptKey.PadRight(8, ' ');
            byte[] rgbKey = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 8));
            byte[] rgbIV = Keys;
            byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptString);
            DESCryptoServiceProvider dCSP = new DESCryptoServiceProvider();
            MemoryStream mStream = new MemoryStream();
            CryptoStream cStream = new CryptoStream(mStream, dCSP.CreateEncryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
            cStream.Write(inputByteArray, 0, inputByteArray.Length);
            cStream.FlushFinalBlock();
            return Convert.ToBase64String(mStream.ToArray());

        }

        /// <summary>
        /// DES解密字符串
        /// </summary>
        /// <param name="decryptString">待解密的字符串</param>
        /// <param name="decryptKey">解密密钥,要求为8位,和加密密钥相同</param>
        /// <returns>解密成功返回解密后的字符串,失败返源串</returns>
        public static string Decode(string decryptString, string decryptKey)
        {
            try
            {
                decryptKey = StringHelper.GetSubString(decryptKey, 8, "");
                decryptKey = decryptKey.PadRight(8, ' ');
                byte[] rgbKey = Encoding.UTF8.GetBytes(decryptKey);
                byte[] rgbIV = Keys;
                byte[] inputByteArray = Convert.FromBase64String(decryptString);
                DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider();

                MemoryStream mStream = new MemoryStream();
                CryptoStream cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
                cStream.Write(inputByteArray, 0, inputByteArray.Length);
                cStream.FlushFinalBlock();
                return Encoding.UTF8.GetString(mStream.ToArray());
            }
            catch
            {
                return "";
            }
        }

        // Methods
        /// <summary>
        /// DES 解密字符串
        /// </summary>
        /// <param name="String">待解密的字符串</param>
        /// <param name="Key">解密密钥,要求为8位</param>
        /// <returns>解密成功返回解密后的字符串，失败返源串</returns>
        public static string Decrypt(string String, string Key)
        {
            string s = (((Key == null) || (Key.Length < 8)) ? DefaultKey : Key).Substring(0, 8);
            string str2 = String;
            byte[] bytes = Encoding.UTF8.GetBytes(s);
            byte[] keys = Keys;
            byte[] buffer = Convert.FromBase64String(str2);
            DESCryptoServiceProvider provider = new DESCryptoServiceProvider();
            MemoryStream stream = new MemoryStream();
            CryptoStream stream2 = new CryptoStream(stream, provider.CreateDecryptor(bytes, keys), CryptoStreamMode.Write);
            try
            {
                stream2.Write(buffer, 0, buffer.Length);
                stream2.FlushFinalBlock();
            }
            catch
            {
            }
            return Encoding.UTF8.GetString(stream.ToArray());
        }

        /// <summary>
        /// DES 加密字符串
        /// </summary>
        /// <param name="String">待加密的字符串</param>
        /// <param name="Key">加密密钥,要求为8位</param>
        /// <returns>加密成功返回加密后的字符串，失败返回源串</returns>
        public static string Encrypt(string String, string Key)
        {
            string s = (((Key == null) || (Key.Length < 8)) ? DefaultKey : Key).Substring(0, 8);
            string str2 = String;
            byte[] bytes = Encoding.UTF8.GetBytes(s);
            byte[] keys = Keys;
            byte[] buffer = Encoding.UTF8.GetBytes(str2);
            DESCryptoServiceProvider provider = new DESCryptoServiceProvider();
            MemoryStream stream = new MemoryStream();
            CryptoStream stream2 = new CryptoStream(stream, provider.CreateEncryptor(bytes, keys), CryptoStreamMode.Write);
            try
            {
                stream2.Write(buffer, 0, buffer.Length);
                stream2.FlushFinalBlock();
            }
            catch
            {
            }
            return Convert.ToBase64String(stream.ToArray());
        }
    }

    public static class DESEncrypt
    {
        //默认密钥向量
        private static byte[] Keys = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };

        #region ========加密========

        /// <summary> 
        /// 加密数据 
        /// </summary> 
        /// <param name="Text"></param> 
        /// <param name="sKey"></param> 
        /// <returns></returns> 
        public static string Encrypt(string Text, byte[] sKey, byte[] sIv)
        {
            try
            {
                DESCryptoServiceProvider des = new DESCryptoServiceProvider();
                byte[] inputByteArray;
                inputByteArray = Encoding.Default.GetBytes(Text);
                des.Key = sKey;
                des.IV = sIv;
                System.IO.MemoryStream ms = new System.IO.MemoryStream();
                CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write);
                cs.Write(inputByteArray, 0, inputByteArray.Length);
                cs.FlushFinalBlock();
                StringBuilder ret = new StringBuilder();
                foreach (byte b in ms.ToArray())
                {
                    ret.AppendFormat("{0:X2}", b);
                }
                return ret.ToString();
            }
            catch
            {
                return Text;
            }
        }

        /// <summary> 
        /// DES加密字符串 
        /// </summary> 
        /// <param name="encryptString">待加密的字符串</param> 
        /// <param name="encryptKey">加密密钥,要求为8位</param> 
        /// <returns>加密成功返回加密后的字符串,失败返回源串</returns> 
        public static string Encrypt(string encryptString, string encryptKey, byte[] encryptIV)
        {
            try
            {
                DESCryptoServiceProvider des = new DESCryptoServiceProvider();
                byte[] inputByteArray;
                inputByteArray = Encoding.Default.GetBytes(encryptString);
                encryptKey = StringHelper.CutString(encryptKey, 0, 8);
                byte[] sKey = Encoding.ASCII.GetBytes(encryptKey);
                des.Key = sKey;
                des.IV = encryptIV;
                System.IO.MemoryStream ms = new System.IO.MemoryStream();
                CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write);
                cs.Write(inputByteArray, 0, inputByteArray.Length);
                cs.FlushFinalBlock();
                StringBuilder ret = new StringBuilder();
                foreach (byte b in ms.ToArray())
                {
                    ret.AppendFormat("{0:X2}", b);
                }
                return ret.ToString();
            }
            catch
            {
                return encryptString;
            }
        }

        /// <summary> 
        /// DES加密字符串 
        /// </summary> 
        /// <param name="encryptString">待加密的字符串</param> 
        /// <param name="encryptKey">加密密钥,要求为8位</param> 
        /// <returns>加密成功返回加密后的字符串,失败返回源串</returns> 
        public static string Encrypt(string encryptString, string encryptKey)
        {
            return Encrypt(encryptString, encryptKey, Keys);
        }

        #endregion

        #region ========解密========

        /// <summary> 
        /// 解密数据 
        /// </summary> 
        /// <param name="Text"></param> 
        /// <param name="sKey"></param> 
        /// <returns></returns> 
        public static string Decrypt(string Text, byte[] sKey, byte[] sIv)
        {
            try
            {
                DESCryptoServiceProvider des = new DESCryptoServiceProvider();
                int len;
                len = Text.Length / 2;
                byte[] inputByteArray = new byte[len];
                int x, i;
                for (x = 0; x < len; x++)
                {
                    i = Convert.ToInt32(Text.Substring(x * 2, 2), 16);
                    inputByteArray[x] = (byte)i;
                }
                des.Key = sKey;
                des.IV = sIv;
                System.IO.MemoryStream ms = new System.IO.MemoryStream();
                CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);
                cs.Write(inputByteArray, 0, inputByteArray.Length);
                cs.FlushFinalBlock();
                return Encoding.Default.GetString(ms.ToArray());
            }
            catch
            {
                return Text;
            }
        }

        /// <summary> 
        /// DES解密字符串
        /// </summary> 
        /// <param name="Text">待解密的字符串</param> 
        /// <param name="sKey">解密密钥,要求为8位,和加密密钥相同</param> 
        /// <returns>解密成功返回解密后的字符串,失败返源串</returns> 
        public static string Decrypt(string decryptString, string decryptKey, byte[] encryptIV)
        {
            try
            {
                DESCryptoServiceProvider des = new DESCryptoServiceProvider();
                int len;
                len = decryptString.Length / 2;
                byte[] inputByteArray = new byte[len];
                int x, i;
                for (x = 0; x < len; x++)
                {
                    i = Convert.ToInt32(decryptString.Substring(x * 2, 2), 16);
                    inputByteArray[x] = (byte)i;
                }
                decryptKey = StringHelper.CutString(decryptKey, 0, 8);
                byte[] sKey = Encoding.ASCII.GetBytes(decryptKey);
                des.Key = sKey;
                des.IV = encryptIV;
                System.IO.MemoryStream ms = new System.IO.MemoryStream();
                CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);
                cs.Write(inputByteArray, 0, inputByteArray.Length);
                cs.FlushFinalBlock();
                return Encoding.Default.GetString(ms.ToArray());
            }
            catch
            {
                return decryptString;
            }
        }

        /// <summary> 
        /// DES解密字符串
        /// </summary> 
        /// <param name="Text">待解密的字符串</param> 
        /// <param name="sKey">解密密钥,要求为8位,和加密密钥相同</param> 
        /// <returns>解密成功返回解密后的字符串,失败返源串</returns> 
        public static string Decrypt(string decryptString, string decryptKey)
        {
            return Decrypt(decryptString, decryptKey, Keys);
        }

        #endregion

        public static string Encrypt(string strPassword, int intFormat)
        {
            switch (intFormat)
            {
                case 0:
                    return FormsAuthentication.HashPasswordForStoringInConfigFile(strPassword, "SHA1").ToLower();
                case 1:
                    return FormsAuthentication.HashPasswordForStoringInConfigFile(strPassword, "MD5").ToLower();
            }
            return "";
        }

        public static string Encrypt1(string strPassword)
        {
            FormsAuthenticationTicket ticket = new FormsAuthenticationTicket(strPassword, true, 2);
            return FormsAuthentication.Encrypt(ticket).ToString();
        }



        /// <summary>
        /// 根据配置对指定字符串MD5加密并截取指定的长度
        /// </summary>
        /// <param name="S">加密的字符串</param>
        /// <param name="start">开始的字符串位置</param>
        /// <param name="last">结束的字符串位置</param>
        /// <returns>加密后的字符串</returns>
        public static string GetHash(string S, int start, int last)
        {
            return GetHash(S).Substring(start, last);
        }

        /// <summary>
        /// 根据配置对指定字符串MD5加密，并转换成小写
        /// </summary>
        /// <param name="s">加密的字符串</param>
        /// <returns></returns>
        public static string GetHash(string s)
        {
            s = System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(s.ToString(), "md5").ToString();
            return s;
        }

        #region "MD5加密"
        /// <summary>
        /// MD5加密
        /// </summary>
        /// <param name="str">加密字符</param>
        /// <param name="code">加密位数16/32</param>
        /// <returns></returns>
        public static string md5(string str, int code)
        {
            string strEncrypt = string.Empty;
            if (code == 16)
            {
                strEncrypt = System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(str, "MD5").Substring(8, 16);
            }

            if (code == 32)
            {
                strEncrypt = EncryptMD5(str);
            }

            return strEncrypt;
        }

        /// <summary>
        /// MD5加密
        /// </summary>
        /// <param name="str">加密的字符串</param>
        /// <returns>加密后的字符串</returns>
        public static string EncryptMD5(string str)
        {
            return System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(str, "MD5");
        }

        /// <summary>
        /// PHPMD5加密方式
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public static string MD5(string str)
        {
            byte[] bytes = Encoding.Default.GetBytes(str);
            bytes = new MD5CryptoServiceProvider().ComputeHash(bytes);
            string str2 = "";
            for (int i = 0; i < bytes.Length; i++)
            {
                str2 = str2 + bytes[i].ToString("x").PadLeft(2, '0');
            }
            return str2;
        }

        /// <summary>
        /// 自定义SHA1加密函数
        /// </summary>
        /// <param name="_StrTemp"></param>
        /// <returns></returns>
        public static string _SHA1(string _StrTemp)
        {
            string StrSHA1 = string.Empty;
            if (_StrTemp != null)
            {
                StrSHA1 = System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(_StrTemp, "SHA1").ToUpper();

            }
            return StrSHA1;
        }
        #endregion

    }
}
